Pedestrian_A

真實加拿大一号公路

Pedestrian_A

交通空氣污染應該都幾嚴重呀tvb now,tvbnow,bttvb% O+ f8 e2 p  t8 q" Q2 T6 O
free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter: B, S+ W  L. S) v9 m% m

+ @, ]4 c4 b& t1 ]www2.tvboxnow.com加拿大很多樹但也期望森林吸收掉人們無節制排放的二氧化碳。tvb now,tvbnow,bttvb& M' }9 ]0 M% o% {! ^  y$ Y
SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

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0 W$ u: U/ [- Z0 N9 w  X) m7 F# R公仔箱論壇No, I read that when the leaves fall it released CO2 back to nature.TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。) k7 |4 V  g5 t: |
I don't know its true or not.
. K* o" m+ T' ~# mSweetLemon 發表於 2016-7-14 08:05 PM

A tree can absorb 13lb CO2 every year.  A typical V8 car produce 220g CO2 per km.  How many trees are needed?